(COMBO) This combination of pictures created on November 12, 2018 shows
North Korea's leader Kim Jong Un(L) during the Inter-Korean summit in the Peace House building on the southern side of the truce village of Panmunjom on April 27, 2018, and
US President Donald Trump during a post-election press conference in the East Room of the White House in Washington, DC on November 7, 2018. - North Korea is operating at least 13 undeclared bases to hide mobile, nuclear-capable missiles, a new study released November 12, 2018 has found, raising fresh doubts over US President Donald Trump's signature foreign policy initiative. Trump has hailed his July summit with North Korean leader Kim Jong Un as having opened the way to denuclearization of the divided peninsula, defusing tensions that less than a year ago brought the two countries to the brink of conflict. (Photos by Korea Summit Press Pool and MANDEL NGAN / various sources / AFP) (Photo credit should read KOREA SUMMIT PRESS POOL,MANDEL NGAN/AFP/Getty Images)